Question

rezolva as equaçoes :
1) -2x+20=6x
2) 2x sob 10 - 2 sob 5 =4
3)4x+2 sob 9= x+7 sob 3

Answer 1

SO SEI A 1
-2x+20=6x
6x+2x=20
8x=20
x=20÷8
x=2.5